Rustual Boy is a Virtual Boy emulator. It can be used to play existing Virtual Boy games, as well as be a helpful development/debugging tool for homebrew for this platform.
The name “Rustual Boy” is a portmanteau of the words Rust and Virtual Boy. Ok, the Virtual Boy part was obvious, but why Rust? In fact, Rustual Boy is written in the Rust programming language – a “systems programming language that runs blazingly fast, prevents segfaults, and guarantees thread safety.” Rust is a wonderful language with a thriving community, and as such provides a fantastic platform for an emulation project!